////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1996-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <sys/types.h>

#if defined (HAVE_PWD_H)
#  include <pwd.h>
#endif

#include "lo-error.h"
#include "oct-password.h"

#define NOT_SUPPORTED(nm)                       \
  nm ": not supported on this system"

OCTAVE_NORETURN static
void
err_invalid (void)
{
  (*current_liboctave_error_handler) ("invalid password object");
}

namespace octave
{
  namespace sys
  {
    std::string
    password::name (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_name;
    }

    std::string
    password::passwd (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_passwd;
    }

    uid_t
    password::uid (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_uid;
    }

    gid_t
    password::gid (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_gid;
    }

    std::string
    password::gecos (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_gecos;
    }

    std::string
    password::dir (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_dir;
    }

    std::string
    password::shell (void) const
    {
      if (! ok ())
        err_invalid ();

      return m_shell;
    }

    password
    password::getpwent (void)
    {
      std::string msg;
      return getpwent (msg);
    }

    password
    password::getpwent (std::string& msg)
    {
#if defined HAVE_GETPWENT
      msg = "";
      return password (::getpwent (), msg);
#else
      msg = NOT_SUPPORTED ("getpwent");
      return password ();
#endif
    }

    password
    password::getpwuid (uid_t uid)
    {
      std::string msg;
      return getpwuid (uid, msg);
    }

    password
    password::getpwuid (uid_t uid, std::string& msg)
    {
#if defined (HAVE_GETPWUID)
      msg = "";
      return password (::getpwuid (uid), msg);
#else
      octave_unused_parameter (uid);

      msg = NOT_SUPPORTED ("getpwuid");
      return password ();
#endif
    }

    password
    password::getpwnam (const std::string& nm)
    {
      std::string msg;
      return getpwnam (nm, msg);
    }

    password
    password::getpwnam (const std::string& nm, std::string& msg)
    {
#if defined (HAVE_GETPWNAM)
      msg = "";
      return password (::getpwnam (nm.c_str ()), msg);
#else
      octave_unused_parameter (nm);

      msg = NOT_SUPPORTED ("getpwnam");
      return password ();
#endif
    }

    int
    password::setpwent (void)
    {
      std::string msg;
      return setpwent (msg);
    }

    int
    password::setpwent (std::string& msg)
    {
#if defined (HAVE_SETPWENT)
      msg = "";
      ::setpwent ();
      return 0;
#else
      msg = NOT_SUPPORTED ("setpwent");
      return -1;
#endif
    }

    int
    password::endpwent (void)
    {
      std::string msg;
      return endpwent (msg);
    }

    int
    password::endpwent (std::string& msg)
    {
#if defined (HAVE_ENDPWENT)
      msg = "";
      ::endpwent ();
      return 0;
#else
      msg = NOT_SUPPORTED ("endpwent");
      return -1;
#endif
    }

    password::password (void *p, std::string& msg)
      : m_name (), m_passwd (), m_uid (0), m_gid (0), m_gecos (),
        m_dir (), m_shell (), m_valid (false)
    {
#if defined (HAVE_PWD_H)
      msg = "";

      if (p)
        {
          struct ::passwd *pw = static_cast<struct ::passwd *> (p);

          m_name = pw->pw_name;
          m_passwd = pw->pw_passwd;
          m_uid = pw->pw_uid;
          m_gid = pw->pw_gid;
          m_gecos = pw->pw_gecos;
          m_dir = pw->pw_dir;
          m_shell = pw->pw_shell;

          m_valid = true;
        }
#else
      octave_unused_parameter (p);

      msg = NOT_SUPPORTED ("password functions");
#endif
    }
  }
}
